[Feature Request]: Support Rank feature query

[yingfeng]

Is there an existing issue for the same feature request?

• I have checked the existing issues.

Is your feature request related to a problem?

No response

Describe the feature you'd like

Rank Feature Query in ES is used in many enterprise scenarios. Infinity will provide similar feature accordingly.

A scenario is to provide hierarchical knowledge base in RAGFlow, the result is a combination of knowledge base with higher quality or higher priority with other general knowledge bases.

Describe implementation you've considered

No response

Documentation, adoption, use case

No response

Additional information

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